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脱式计算(1)49×37×13(2)112×12(3)36×(14+518)(4)10.5÷10.5×710(5)(1+34)÷(1-34)(6)2.5×313×0.4×310(7)710×516÷2132(8)(710−710×27)÷14(9)1.4×3.7+3.7×8.6.

题目详情
脱式计算
(1)49×
3
7
×
1
3
(2)
1
12
×12
(3)36×(
1
4
+
5
18
(4)10.5÷10.5×
7
10
(5)(1+
3
4
)÷(1-
3
4
(6)2.5×3
1
3
×0.4×
3
10
(7)
7
10
×
5
16
÷
21
32
(8)(
7
10
7
10
×
2
7
)÷
1
4
(9)1.4×3.7+3.7×8.6.
▼优质解答
答案和解析
(1)49×
3
7
×
1
3

=49×(
3
7
×
1
3
),
=49×
1
7

=7;

(2)
1
12
×12=1;

(3)36×(
1
4
+
5
18
),
=36×
1
4
+36×
5
18

=9+10,
=19;

(4)10.5÷10.5×
7
10

=1×
7
10

=
7
10


(5)(1+
3
4
)÷(1-
3
4
),
=1
3
4
÷
1
4

=7;

(6)2.5×3
1
3
×0.4×
3
10

=(2.5×0.4)×(3
1
3
×
3
10
),
=1×1,
=1;

(7)
7
10
×
5
16
÷
21
32

=
7
32
÷
21
32

=
1
3


(8)(
7
10
7
10
×
2
7
)÷
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